Electric-circuit-controlling apparatus.



No. 764,218- PATENTBD JULY 5, 1904. I

J. P. TIRRELL.

Va ELECTRIC CIRCUIT CONTROLLING APPARATUS.

APPLICATION FILED OUT. 10, 1903.

N0 MODEL.

I No. 764,218.

UNITED STATES Patented July 5, 1904.

PATENT OFFIC JACOB P..TIRRELL, OFBOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO JAY B. CRAIVFORD, OF BOSTON, MASSACHUSETTS.

ELECTRIC-CIRCUlT CONTBOLLlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 764,218, dated July 5, 1904.

Application filed October 10, 1903. Serial No. 176,476. (No model.)

To all whom it may concern:

tively slow moving motor, such as a clocktrain. I 5 The object of the invention in general is to provide improved means for both making and breaking the circuits suddenly in order to avoid arcing and secure instant and perfect contact and to accomplish this with the expenditu re of a minimum amount of power.

To this end the invention consists in certain novel features of construction and arrangement hereinafter described and claimed.

Of the accompanying drawings, Figure 1 represents a front elevation, partly broken away, of a circuit-controlling apparatus constructed according to this invention. Fig. 2 represents a side elevation thereof. Fig. 3 represents a perspective view of the circuit- 3 controller proper. Fig. 4 represents a sectional view thereof. Fig. 5 represents a rear elevation. Figs. 6 and 7 represent detail edge views of the working parts in two different positions. Fig. 8 represents an elevation 3 5 showing a modification. Fig. 9 represents an elevation showing a second modification.

The same reference characters indicate the same parts in all the figures.

In the drawings, 10 represents a clock-train 4 of ordinary construction having a suitable fly or governor 11 and a middle arbor 12, rotating at any suitable speed. On said arbor is fixed an arm or carrier 13, rotating at a uniform constant speed and carrying a roller 14, which acts as a tripper, said roller operating on a tongue or projection 15 on an arm or carrier 16, which loosely surrounds the arbor 12, said arm 16 being flexible or resilient, so as to bend out of its normal plane. A spring 17 connects the arms 13 and 16 and acts as an ac- 5 celerator for the arm 16, the spring revolving with said arms.

18 is a pin on the arm 16, adapted to cooperate with a series of fixed pins or contacts 19 19, radially arranged in acircle concentric with the arbor 17 and mounted in a suitable stationary insulating-ring 20. The contact-pins 19 are connected with the illuminating or other circuits to be controlled, and the arm 16 is included by suitable connections in the common 6 return of these circuits.

The operation is as follows: Assuming the pin 18 to be in contact with one of the stationary pins 19 and yieldingly so held by the spring 17, the roll 14 on arm 13 advancing at 5 i a constant speed encounters the projection 15 and springs the arm 16 outwardly. so as to re lease the pin 18 from the pin 19 with which it is engaged. The arm 16 is then free to advance forward under the impetus of the accel- 7 crating-spring 17 and does so until the arm 16 resuming its original plane or path, owing to its resiliency, brings its pin 18 in contact with the next succeeding pin 19. As the arm 16 is thereby carried forward in advance of the arm 7 5 13 the arm 16 remains stationary until the roller 18 has again advanced to trip or release it. The circuits are thus made and broken instantaneously.

In Fig. 8 a modified structure is shown in which 16" is an intermittently-progressing arm having a pivoted latch 21, whose free end is yieldingly impelled inwardly by a spring 22 in a radial direction, said latch intermittently engaging the contact-pins 19. A re- 5 leasing tripper or roller 14 on a constantlyprogressing arm 13 operates on a cam-surface 23 on the latch 21, so as to intermittently release the latter from the contact-pins.

In Fig. 9 is shown a second modification em- 9 bodying an intermittently-progressing rigid arm 16, having a catch projection 18, adapted to be engaged bycontact-pins 19 on springarms 24. A trippingroller 14" on a constantly-rotating arm 13 engages the springarms 24: at predetermined intervals and moves the pins 19 out of the path of the projection 18 thereby intermittently releasing the arm 16 I do not confine myself to the exact details of construction above described, as they may be varied Within the scope of the invention.

I claim 1. In an electric-circuit-controlling apparatus, a series of stationary contacts, a revolving contact intermittently stopped by said stationary contacts, said stationary and revolving contacts being relatively movable to bring the stationary contacts into and out of the path of the revolving contact, a continuouslyrevolving tripping device for releasing the revolving contact from the stationary contacts, and means for accelerating said revolving contact from one position to the next.

2. In an electric-circuit-controlling apparatus, a series of stationary contacts, an intermittently progressing revolving contact yieldingly mounted With respect to said stationary contacts, a continuously-revolving tripper for releasing said revolving contact, and a spring revolving With said tripper and connected'to accelerate said revolving contact.

3. In an electric-ci-rcuit-controlling apparatus, a series of stationary contacts, a. rotary carrier having a yielding contact to cooperate with said stationary contacts, a second rotary carrier on the same axis as the first said carrier having a tripper to release said yielding contact from the stationary contacts, and a spring connecting said carriers to accelerate the first said carrier.

4. In an electric-circuit-controlling apparatus, in combination a clock-train, an arbor geared to a relatively sloW moving and highpowered part of said clock-train and having an arm fixed thereon, said arm provided with a tripping device, a flexible loosely-mounted arm having said arbor as an axis and provided With a contact and a circular series of fixed contacts, and a spring normally holding the arm having a continuous movement and the J ACOB B.

Witnesses:

.(J. F. BROWN,

E. BATCH'ELDER. 

